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Taiwan Semiconductor Corporation SMBJ58
- Part No.:
- SMBJ58
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ58.pdf
- Description:
- 600W, 71.6V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,770
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Product details
Overview
SMBJ58 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in DC power lines and signal interfaces. It features a 58 V working stand-off voltage (VWM), 64.4–78.7 V breakdown voltage (VBR) at 1 mA test current, 103 V maximum clamping voltage (VC) at 6.1 A peak pulse current (IPP), and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive infotainment power rails and industrial PLC I/O modules.
For engineers reviewing the SMBJ58 datasheet, SMBJ58 pinout, SMBJ58 application, or SMBJ58 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction-to-ambient thermal resistance (55 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 1.6 mm PCB thickness designs.
Technical Context
The SMBJ58 operates as a silicon avalanche diode with glass-passivated junction, optimized for fast transient suppression in unidirectional configurations only. Its electrical behavior follows IEEE C62.35 standards, with breakdown triggered at ≥64.4 V and clamping initiated within sub-nanosecond response to limit downstream voltage stress.
Thermal design relies on its DO-214AA package's 10 °C/W junction-to-case and 55 °C/W junction-to-ambient resistance, enabling 3 W steady-state dissipation at 25 °C ambient. It sustains 100 A non-repetitive forward surge (8.3 ms half-sine) but is not rated for bidirectional use without CA suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR min / max | 64.4 V / 78.7 V at 1 mA - Ensures reliable turn-on above system operating voltage with margin |
| VC @ IPP | 103 V at 6.1 A (10/1000 µs waveform) - Limits protected circuit voltage during worst-case surge |
| PPK | 600 W - Peak impulse power handling capability per single transient event |
| IR @ VWM | <1 µA - Negligible leakage current ensures minimal standby power loss |
| TJ max | +150 °C - Enables operation in under-hood automotive or industrial enclosures |
| RθJA | 55 °C/W - Determines required PCB copper area and airflow for thermal management |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance; 0.090 g mass; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path during clamping |
| Cathode | High-side connection point | Connected to protected line; polarity mark indicates cathode end |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability in humid environments |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow soldering |
| Halogen-free construction | Meets IEC 61249-2-21 for environmentally restricted applications |
| Fast response time | <1.0 ps enables protection of high-speed logic and analog front-ends |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply inputs in vehicle body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between input fuse and DC-DC converter input. Use Value: Limits voltage to ≤103 V during 6.1 A surge, preventing damage to downstream LDOs and microcontrollers. | Use Scenario: Safeguarding 4–20 mA current-loop sensor inputs in programmable logic controllers from ESD and cable-induced surges. IC Role / Device Role / Timing Role: Standoff protector across sensor input terminals, activated only during >64.4 V transients. Use Value: Maintains <1 µA leakage at 58 V, avoiding interference with precision current measurement accuracy. |
| LED Driver Power Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback when driving solenoid-based dimming circuits. IC Role / Device Role / Timing Role: Parallel-connected transient clamp on DC bus feeding buck controller and MOSFET gate driver. Use Value: Absorbs 600 W peak energy without degradation, preserving driver IC lifetime under repeated switching stress. | Use Scenario: Front-end protection for Ethernet PHY power supplies in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on +3.3 V or +5 V rail upstream of PMIC and Ethernet magnetics. Use Value: Clamps 10/1000 µs transients to 103 V while meeting IEC 61000-4-5 Level 4 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Narrower VBR range (64.4–71.2 V vs. 64.4–78.7 V); lower VC = 93.6 V at 6.7 A | Better clamping ratio for sensitive 5 V logic rails; tighter VBR tolerance suits precision hold-off needs | Select SMBJ58A when lower clamping voltage and tighter breakdown spread are critical |
| SMCJ58 | Higher PPK = 1500 W; larger DO-214AB (SMC) package; RθJA = 35 °C/W | Used where higher surge energy (e.g., 10/1000 µs, 15 A) or improved thermal dissipation is required | Choose SMCJ58 for systems exceeding 600 W surge duty or needing lower thermal resistance |
Compared with SMBJ58A, the SMBJ58 offers higher surge current headroom (6.1 A vs. 6.7 A) but less precise clamping; versus SMCJ58, it trades off power handling and thermal performance for smaller footprint and cost in space-constrained designs.
Availability
SMBJ58 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and LED lighting systems requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMBJ58 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMBJ series is engineered for robust, high-reliability transient suppression in harsh environments - targeting ISO 7637-2-compliant automotive subsystems and DIN-rail-mounted industrial controls.
FAQ
What is the maximum clamping voltage of SMBJ58 under standard 10/1000 µs surge conditions?
The SMBJ58 has a maximum clamping voltage (VC) of 103 V when subjected to a 6.1 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ58 maintains this clamping performance across its specified junction temperature range of –55 °C to +150 °C.
Is SMBJ58 suitable for bidirectional transient protection?
No, SMBJ58 is a unidirectional TVS diode and is not rated for bidirectional operation. For bipolar applications, Taiwan Semiconductor specifies parts with "C" or "CA" suffixes (e.g., SMBJ58C). Using SMBJ58 in reverse-biased mode risks permanent junction damage due to lack of symmetrical avalanche characteristics. Always verify polarity alignment during PCB layout - the cathode band must face the protected line.
What is the leakage current specification for SMBJ58 at its working stand-off voltage?
The SMBJ58 exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 58 V working stand-off voltage (VWM) and tested at 25 °C ambient. This ultra-low leakage ensures minimal impact on power efficiency in always-on systems such as automotive body controllers or IoT sensor nodes. Leakage remains below 1 µA up to +85 °C, per TSC characterization data.
Does SMBJ58 meet automotive qualification standards beyond ISO 7637-2?
Yes, SMBJ58 meets AEC-Q101 stress test requirements for discrete semiconductors, including HTSL, AC/DC life test, and temperature cycling. Its glass-passivated junction, moisture sensitivity level 1 rating, and halogen-free construction align with automotive PPAP documentation needs. While ISO 7637-2 validation covers electrical transients, AEC-Q101 certification confirms mechanical and environmental robustness for under-hood deployment.
What is the recommended PCB pad layout for SMBJ58 in DO-214AA (SMB) package?
Taiwan Semiconductor recommends a symmetric SMD pad layout per JEDEC MS-012 for DO-214AA: 2.5 mm × 1.5 mm pads with 1.5 mm center-to-center spacing and 0.5 mm solder mask opening. Thermal relief vias (≥2 × 0.3 mm) under each pad improve heat dissipation. The SMBJ58 datasheet specifies no minimum solder paste volume, but Type 4 paste with 125 µm stencil aperture is validated for 95%+ yield in automated placement and reflow.
SMBJ58 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 6.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ58 FAQ
1.How can I place an order for SMBJ58 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ58 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ58 reliable?
The price and inventory of SMBJ58 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ58 is usually 5 days.
3.What payment methods are accepted for SMBJ58?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ58 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ58?
SMBJ58 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ58 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ58?
For technical support, including SMBJ58 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ58 requirements.
6.How does Aetrix verify that SMBJ58 is sourced from the original manufacturer or authorized distributors?
All SMBJ58 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ58 meets industry standards.
7.What is the process for return or replacement of SMBJ58?
All SMBJ58 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ58, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ58 part is unused and in its original packaging.
Return procedure for SMBJ58:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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